What do you mean ten sheep are incomplete?

There is a folk proverb: "Ten sheep are not complete". That is to say: the life of sheep is not easy. Nine out of ten people have incomplete families, either small without parents, widowed halfway, or childless. Because of this, people who belong to sheep are taboo. Couples can't avoid having children in the Year of the Sheep, and they don't disclose the sheep. They either add one year to the horse or subtract one year from the monkey.

There is also a "destiny view" in marriage collocation: for example, some remarks such as "chickens and dogs beheaded, chickens and monkeys are not in the end, dragons and tigers are not in harmony, and ten sheep are not complete" and so on.

But for example, we know this is a fallacy. Zeng Guofan, Li Hongzhang and Cixi are all sheep.